Improvement in the-manufacture of sugar



amt tatrt ARNOLD WEIOHERT,

or NEW YORK, NY,

Letters Patent-No. 108,861, dated November 1,1870,

IMPROVEMENT m THE-MANUFACTURE 0F SUGAR.

The Schedule referred to in these Letters Patent. and making part of thesame To all whom it may concern:

Be it known that I, ARNOLD WEIGHERT, of the city, county, and State ofNew York, have invented a new and usefui Improvement in theillanufacture of Sugar; and I do hereby deelaregthat the following is afull, clear, and exact description of the same.

In the manufacture of raw. sugar from cane by the process or processesin common use on plantations, there is an enormous waste owing to solarge a proportion of crystalline or erystallizable sugar beingvdegradedinto non-crystalline sugar, and in that state remaining in the molasses.

. With a view to "obviate this waste, and to supply to the sugar-refinerthe entire saccharine product of the sugar-cane, there has recently beenadopted in some places,ito a limited extent, aplan of evaporating thejuice'without attempting anything likelperfect or reg ularcrystallization, orthe separation-of the crystal-' line andnon-crystallineproducts, into aconglomerate mass which is known asconcrete; and-in this state the sugar has been shipped to market. 7

The only apparatus which has heretofore, so far as I have known, beenused successfully, or the only one which has been used to any extent forthe manufacture of this concrete, has been one of English manufac: ture,specially contrived for-the purpose, and known as a concretor.

This apparatus performs the evaporation in the atmosphere, and. besidesbeing somewhat complicated and difficult to manage, is very wasteful offuel.

I have foundby experiment that. the concrete can I be successfuliymanufactured in the vacuum-pan, and that in all places where there is aplentiful supply of water it can be so manufactured more economicallythan by the concretor; and A This invention consists in the manufactureof conerete sugar by evaporation in thevacuum-pan.

In carrying out the process, any kind of vacuum-pan may be used, and theprocess may be performed throughout in a single pan or system of pans;but I find it better, on account of econonomy and expedition, toevaporate the cane-juicelto a density of about 30 Beanme, in onepan orsystem of pans, and then -.to transfer-it to'another pan or" system ofpans, in

which I continue the evaporation until the concrete is obtained, and tofill up the first pan or series again with fresh juice, keeping ouepanor system of pans employed in the preparatory evaporation, and

the other in the final evaporation.

, I prefcrtouse for the preparatory evaporation the systemof vacuum-pansknown in the manufacture of beet-root sugar as triple-effet, and, inthefi'nal evaporation, a simple vacuum-pan such as is commonly'used inthe manufacture of cane-sugar.

The juice',"before being introduced to the first pan or series of pans,is simply subjected to the usual defeoating and clarifying process.

\VhatI'claim as my invention,.and desire to secure by Letters Patent,is-

' 1 The manufacture of concrete sugar by the evaporation of the juice inthe vacuum-pan, substantially as herein described.

- ARNOLD W'EIOH-ERT.

\Vitnessesr FRED. HAYNES, Fern). Tusom

